Oil cooling means



Oct. 3, 1933. J. B. FISHER OIL COOLING MEANS Filed 001:. 2:5, 931 :5 Sheets-Sheet '2 I 722/612 2'01": Tia/226s E. T2572 6 Oct. 3, 1933. J B, FISHER OIL COOLING MEANS Filed-Oct. 23, 1931 I 3 sheets sheet 3 Patented Oct. 3, 1933 UNITE STATES PATENT JOFFICE Waukesha -Motor Company,

Waukesha,

a corporation of Wisconsin Application October 23, 1931. Serial No. 570,537

Claims.

This invention relates to cooling means, and more'particularly to means for cooling the oil used in lubricating the bearings of an internal combustion engine.

6 One of the main objectsof the invention is to provide mearis of simple andrugged construction and high efliciency for cooling the lubricating-oil of an internal combustion engine. A further object is to provide a comparatively simple and 10 inexpensive structure combining a water manifold and oil cooling means associated therewith in such manner that the oil passing therethrough is subjected to the cooling effect of water flowing through the manifold. Further objects and advantages will appear from the detailed description.

In the drawings:

Figure 1 is a side view of an internal combustion engine illustrating oil cooling means in accordance with my invention applied thereto;

Figure 2 is a fragmentary front view of the engine and the oil cooling means applied thereto; Figure 3 is a plan view partly broken away and in section, of the water manifold structure including the oil cooling means;

Figure 4 is an outer side view, partly broken away and in section, of the structure of Figure 3;

Figure 5 is an outer side view, on an enlarged scale, of the connector for use with the oil cooling 30 means;

Figure 6 is a section taken substantially on line 6-6 of Figure 5; and

Figure '7 is a section taken substantially on line 77 of Figure 3.

I have illustrated my invention, by way of example, as applied to an internal combustion engine E which is, in general, of known type and includes a cylinder block 1 and a crank case 2, an oil pan 3 being secured to the crank case and provided with a sump 4. The engine illustrated is a six cylinder engine, there being three pairs of cylinders and each pair being included in a cylinder block, the space about the cylinders being water jacketed in a known manner. A water 45 outlet manifold 5 is connected to the cylinder heads 6, this manifold being connected by a hose 7 to an inlet at the top of a radiator (not shown) in a known manner.

Cooling water is supplied to the cylinder block through a water inlet manifold 8 which is connected, at its central portion, by means of an elbow 9 and hose 10, to the discharge of a water pump 11 of any suitable or preferred type, the inlet of this pump being connected in a suitable 5 manner, as by means of elbow 12 and'hose 13, and

associated parts,- to the -outlet from the lower tank of the radiator. The relatively cold water from the lower tank of the radiator is thus supplied underpressure to the manifold 8 centrally thereof.

- Referring more particularly to Figures 3 and 4, the manifold 8 comprises end castings 14 and 14: each of which has its inner end portion reduced at 15 to provide a shoulder 16. The end castings 14 and 14a are connected by a tubular body 17, conveniently formed of sheet steel, this body being flared at each end at 18 for reception of reduced portions 15 of the castings 14 and 14a. The flared end portions 18 of body 1'7 contact shoulders 16 and fit snugly about portions 15 of castings 14 and 14a, body 17 being brazed or otherwise suitably secured to the castings. An outlet collar 19 is brazed or otherwise suitably secured to body 17 approximately centrally thereof and'opens into the body, this collar being provided, at its outer end, with a bolting flange 20, the castings 14 and 14a being also provided with bolting flanges 21, the flanges 20 and 21 providing convenient means for bolting the manifold to the cylinder-blocks.

Casting 14 is provided, at the outer side and the inner end thereof, with a head 22 which extends from the top wall to the bottom wall of the casting. This head is hollow and is closed to the interior of the manifold. The head 22 is divided, by an integral web 23, into an inlet passage 24 and an outlet passage 25. An opening 26-extends through the bottom wall of passage 24, a similar opening 27 extending through the bottom wall of passage 25. Casting 14a includes a hollow head 28 at the inner end and the outer side of such casting, this head defining a passage 29 extending from the bottom wall to the top wall of the manifold and closed to the interior thereof. The heads 22 and '28 are connected bytwo series of tubes 30, the ends of which are suitably secured in openings in the inner walls of the heads, as by being sweated into such openings. The tubes 30 connect the passages 24, 29, and 25 in series and provide passages or paths of flow for oil entering passage 24 through opening 26. The oil flows through the tubes of the outer series into head 29 and thence, in a reverse ,direction, through the tubes of the inner series into passage 25, being discharged through opening 27. It will be noted that the tubes 30 are spaced apart and are spaced from the surrounding wall of body 17 of the manifold, so that water flowing through the manifold flow about and over the tubes in the advantage that body atively hot oil flowing through the tubes.

The engine is provided with a pressure lubricating system of suitable type, this system including an oil pump 31, which may be of any suitable type and driven in any suitable or preferred manner, the intake of this pump communicating with sump 4 adjacent the bottom thereof, such intake preferably being surrounded by a suitable screen 32. The discharge of pump 31 is connected, by a tube 33, to an oil outlet opening 34 in the crank case 2. A connector 35, conveniently a rigid brass casting, is interposed. between the crank case and a bolting flange 36 of an oil filter 3'7. The filter and the connector are suitably secured to the crank case as by means of bolts 38. The filter is of any suitable or preferred type, and known in the art, and is provided with an inlet duct 39 and an outlet duct 40. A duct 41, extending through the connector from front to back and adjacent the lower end thereof, has its inner end in register with opening 34 and its outer end in register with duct 39 of the filter 37. The connector is provided with an outwardly extending neck 42 inclined upwardly and outwardly away from the crank case. At its upper end, neck 42 is provided with a bolting flange 43 by means of which the upper end of the connector is bolted to the underface of casting 14. This neck is provided with an outer duct 44 of approximately L- hape, the lower end of which registers with the inner end of duct 40 of the filter, the upper end of duct 44 being in register with opening 26 of passage 24. Neck 42 is further provided with an inner duct 45, also of approximately L-shape, the upper end of duct 45 being in register with opening 27 of passage 25. The lower end of duct 45 registers with an opening 46 through crank case 2, to which opening is connected an oil manifold 47 for conducting oil under pressure to the engine bearings in a known manner.

In the operation of the engine, oil from the sump 4 is delivered under pressure, by pump 31, to the inlet duct 39 of the oil filter 3'7, which is of known type. The oil passes through the filter and is discharged therefrom through duct 40 and duct 44 into passage 24, this oil then flowing through the tubes 30 and passages 29 and 25, and duct 45 to the oil manifold 47 by means of which the cooled oil is delivered to the engine bearings. As above pointed out, the relatively cold water, entering the manifold, flows over and about the tubes 30 in close contact therewith and serves to cool the oil flowing through these tubes to a material extent within a short time. In this manner I effectively prevent objectionable heating of the lubricating oil used in the engine, such as is frequently encountered particularly in hot or warm climates, or in exceptionally warm weather.

A particular advantage of my construction is that all of the parts of the manifold and the cooler are effectively supported in such manner as to'eliminate objectionable vibration, and consequent liability to breakage, thus eliminating this source of difliculty. Also, disposing the tubes 30 within the body 1'? of the manifold, in addition to assuring efficient cooling of the oil has 17 provides a housing for the tubes 30 and guards them against mechanical injury. These tubes, being secured in the heads of the end castings, cooperate with body 1'1 and shoulders 16, to prevent relative intimate contact therewith so as to cool the rel-' movement of the end castings toward or away from each other.

In the particular embodiment of my invention illustrated herein by way of example, I have shown the oil filter'as connected in series with the oil pump and the oil cooler, the latter being connected in series with the oil manifold. This particular method of connection of the oil filter and the oil cooler is not essential, however, and the manner of connecting the oil cooler into the lubricating system may be varied within wide limits. Also, the use of the oil filter, while preferred, is not essential to my invention and this filter may be omitted if desired or if conditions require. In addition, the particular construction of manifold, illustrated by way of example, is not essential to my invention, and the manifold construction can be varied widely as desired or as conditions may require. As above indicated, and as will be understood by those skilled in the art, changes in construction and arrangement of parts of my invention may be resorted to without departing from the field and scope of the same, and I intend to include all such variations, as fall within the scope of the appended claims, in this application in which the preferred form only of my invention is disclosed.

What I claim is:

1. In combination with an internal combustion engine comprising cylinder blocks and a crank case, a pressure lubricating system for supplying lubricant to the engine bearings and including an oil pump having its intake communicating with the lower portion of the crank case, a water manifold communicating with the cylinder blocks, and provided with twohollow heads spaced apart lengthwise of the manifold, one of the heads being divided into an inlet passage and an outlet passage, tubes within the manifold and connecting said passages and the other head in series, means connecting the inlet passage to the discharge of the pump, and means connecting the outlet passage to the lubricating system for delivery of cooled oil thereto.

2. In combination with an internal combustion engine comprising cylinder blocks and a crank case, a pressure lubricating system for supplying lubricant to the engine bearings and including an oil pump having its intakev communicating with the lower portion of the crank case, a water manifold communicating with the cylinder blocks, and provided with two hollow heads spaced apart lengthwise of the manifold, one of the heads being divided into an inlet passage and an outlet passage, tubes within the manifold and connecting said passages and the other head in series, and a connector secured to the crank case and to the manifold, said connector having an inlet duct connected to the discharge of the pump and to said inlet passage, and a duct connected to said outlet passage and to the cooling system for delivering cooled oil thereto.

3. In combination with an internal combustion engine comprising cylinder blocks and a crank case, a pressure lubricating system for supplying lubricant to the engine bearings and including an oil pump having its intake communicating with the lower portion of the crank case, a. water manifold communicating with the cylinder blocks, and provided with two hollow heads spaced apart lengthwise of the manifold, one of the heads being divided into an inlet passage and an outlet passage, tubes within the manifold and connecting said passage and the other head in series, an oil filter, and a connector interposed 1,eaa,ea1

between the filterand' the crank case-said filter and said. connector being secured to the crank case beneath the divided head of the manifold and the upper end of the connector being secured to'said divided head, the filter having inlet and outlet openings and the connector being pro-' vided with a duct connected at one end to the discharge of the pump and registering at its other end with the inlet opening of the filter, said connector being further provided with a second duct establishing communication between the filter and said inlet passage and with a third duct establishing communication between said outlet passage and the lubricating system for delivering cooled oil thereto.

4. In combination with an internal combustion engine comprising cylinder blocks and a crank case, a pressure lubricating system for supplying lubricantto the engine bearings and including an oil pump having its intake communicating with the lower portion'of the crank case, a water manifold communicating at its ends with the cylinder blocks and having a centrai'water' inlet, said manifold being providedadjacent each end with a hollow head, one of said heads being divided into an inlet passage and an outlet passage, tubes within the manifold and connecting said passages and the other head in series, an .oil filter, and a connector interposed between the filter and the crank case, said filter and said connector being secured to the crank case beneath the divided head of the manifold and the upper end of the connector being secured to said divided head, the filter having inlet and outlet openings and the connector being provided with a duct connected at one end to the discharge of the pump and registering at its other end with the inlet opening of the filter, said connector being further provided with a second duct establishing communication between the filter outlet and said inlet passage and with a third duct establishing communication between said outlet passage and the lubricating system for delivering cooled oil thereto. a 5. In combination in a device of the character described, a water manifold adapted for attach ment to the cylinder block of an internal combustion engine,- said manifold comprising a-body portion and end heads provided with passages closed to the interior of the manifold, certain of said passages opening exteriorly of the heads, and tubes connecting the passages of the heads and disposed within the body portion of the manifold. v

6. In combination in a deviceof the character described, a, water manifold adapted for attachment to the cylinder block of an internal combustion engine, said manifold comprising a body portion and end heads provided with passages closed to the interior of the manifold, certain of said passages opening exteriorly of the heads, and

tubes connecting the es of the heads and disposed within the body portion of the manifold and spaced from the surrounding wall of said body portion.

7. In combination in a device of the character described, a water manifold adapted for attachment to the cylinder block of an internal combustion engine, said manifold comprising a body portion and end heads provided with passages closed to the interior of the manifold, and tubes disposed within the body portion of the manifold in spaced relation to the surrounding wall thereof and connecting the passages of the head, said device being provided with means for connecting the tubes to a source of fiuid to be cooled exterior of the manifold and with means for delivering the cooled fiuid exterior to the manifold.

8. In combination in a device of the character described, a water manifold adapted for attachment to the cylinder block of an internal combustion engine, said manifold comprising a body portion and end heads, one of the heads having a r: 0;: and the other head having two separate passages closed to the interior of the manifold and opening exterierly thereof, and tubes within the body portion and connecting the passages of the heads in series.

9. In combination in a device of the character described, a water manifold adapted for attachment to a cylinder block of an internal combustion engine, said manifold comprising end members each having its inner end portion reduced to provide a shoulder, and a body portion with its ends fitting tightly about the reduced ends ofsaid members and abutting said shoulders, each of the end members including a head and the heads having es therein closed to the interior' of the manifold, and tubes secured in the heads and connecting the passages thereof, said tubes being disposed within the body portion of the manifold.

in. In combination in a device of the character described, a water manifold adapted for attachment to a cylinder block of an internal combustionengine, said manifold comprising end members each having its inner end portion reduced to providers shoulder, and a body portion with its ends fitting tightly about the reduced ends of said members and abutting said shoulders, each of the end members including a head, one of the heads having a e therein closed to the e closed to theinterior of the manifold interior of the manifold and the other head hav- I ing two separate passages therein closed to the interior of the manifold and opening exteriorly of said other head, and tubes secured in the heads and connecting the passages thereof in series, said tubes being disposed within the body portion of the manifold.

JAMES B. FISHER. 

